MS-DOS 4.0[a] was a multitasking release of MS-DOS developed by Microsoft based on MS-DOS 2.0. Lack of interest from OEMs, particularly IBM (who previously gave Microsoft multitasking …

Microsoft had long planned that MS-DOS "4" would be a multitasking-capable operating system, but IBM had insisted on creating a new version of regular DOS for use with their PS/2 …

Mar 10, 2021 · ms-dos-4.01a Scanner Internet Archive HTML5 Uploader 1.6.4 . plus-circle Add Review . comment. Reviews There are no reviews yet. Be the first one to write a review. 5,020 …

Apr 25, 2024 · In partnership with IBM, Microsoft is releasing the source code to MS-DOS 4.00 under the MIT license. Learn more.

MS-DOS (/ ˌɛmˌɛsˈdɒs / em-es-DOSS; acronym for Microsoft Disk Operating System, also known as Microsoft DOS) is an operating system for x86 -based personal computers mostly …

DOS 4.0 was the most memory-hungry release of DOS when it came to conventional memory consumption. It was perhaps designed with the idea that a new system with 640KB of …

Multitasking MS-DOS 4.00. These disk images contain the first unearthed copy of Microsoft’s “multitasking” version of MS-DOS since its extremely limited release around late 1985 or early …

Apr 26, 2024 · Microsoft has open-sourced another bit of computing history this week: The company teamed up with IBM to release the source code of 1988's MS-DOS 4.00, a version …

Apr 29, 2024 · From today, Microsoft released on GitHub MS-DOS 4.0. MS-DOS 4.0 is now open source and available with the other older versions of the OS.

This repo contains the original source-code and compiled binaries for MS-DOS v1.25 and MS-DOS v2.0, plus the source-code for MS-DOS v4.00 jointly developed by IBM and Microsoft.